	  <li><a href="/{{current_cancer.id}}/">{{current_cancer.name}}</a>
	    <ul>
	      {% for ds in cancer_data_sets %}
	        {% ifchanged ds.cancer_type.id %}
	          {% if current_cancer.id == ds.cancer_type.id %}
	            <li><a href="#">{{ds.cancer_type.description}}</a></li>
		  {% else %}
	            <li><a href="/{{ds.cancer_type.id}}/">{{ds.cancer_type.description}}</a></li>
		  {% endif %}
		{% endifchanged %}
	      {% endfor %}
	    </ul>
	  </li>
